$sub-img-size: 80px;

.img-con {
  width: $sub-img-size;
  height: $sub-img-size;
  float: left;
  margin-right: 10px;
  border: 1px solid #ccc;
  position: relative;
  &:hover {
    .fa-close {
      display: block;
    }
  }
  img {
    width: 100%;
    height: auto;
  }
  .fa-close {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    height: $sub-img-size;
    line-height: $sub-img-size;
    cursor: pointer;
    display: none;
    font-size: 50px;
    color: #aaa;
    background-color: rgba(0,0,0,.2);
  }
}

.file-upload-con {
  margin-top: 15px;
}